<script setup>
    import { User, Lock } from "@element-plus/icons-vue";
    import { ref } from "vue";
    import { ElMessage } from "element-plus";
    // 控制注册与登录表单的显示， 默认显示注册
    const isRegister = ref(false);

    // 注册数据模型
    const registerData = ref({
        username: "",
        password: "",
        rePassword: "",
    });

    // 自定义确认密码规则
    const rePasswordValid = (rule, value, callback) => {
        if (value === "" || value == null) {
            return callback(new Error("请再次输入密码"));
        }
        if (registerData.value.password != value) {
            return callback(new Error("两次输入密码不一致"));
        }
    };

    // 注册表单校验规则
    const checkRegister = ref({
        username: [
            { required: true, message: "请输入用户名", trigger: "blur" },
            {
                min: 5,
                max: 16,
                message: "用户名长度必须为 5 ~ 16 位",
                trigger: "blur",
            },
        ],
        password: [
            { required: true, message: "请输入密码", trigger: "blur" },
            {
                min: 5,
                max: 16,
                message: "密码长度必须为 5 ~ 16 位",
                trigger: "blur",
            },
        ],
        rePassword: [{ validator: rePasswordValid, trigger: "blur" }],
    });

    // 引入接口
    import { userRegisterService, userLoginService } from "@/api/user.js";

    // 注册
    const register = async () => {
        let result = await userRegisterService(registerData.value);
        ElMessage.success(result.message ? result.message : "注册成功");
    };

    // 引入路由
    import { useRouter } from "vue-router";
    const router = useRouter();

    // 导入 token 状态
    import { useTokenStore } from "@/stores/token.js";
    // 调用 useTokenStore 得到状态
    const tokenStore = useTokenStore();

    // 登录
    const login = async () => {
        const result = await userLoginService(registerData.value);
        // 保存 token
        tokenStore.setToken(result.data);

        ElMessage.success(result.message ? result.message : "登录成功");
        router.push("/");
    };

    // 重置注册数据模型
    const clearRegisterData = () => {
        registerData.value = {
            username: "",
            password: "",
            rePassword: "",
        };
    };
</script>

<template>
    <el-row class="login-page">
        <el-col :span="12" class="bg"></el-col>
        <el-col :span="6" :offset="3" class="form">
            <!-- 注册表单 -->
            <el-form
                ref="form"
                size="large"
                autocomplete="off"
                v-if="isRegister"
                :model="registerData"
                :rules="checkRegister"
            >
                <el-form-item>
                    <h1>注册</h1>
                </el-form-item>
                <el-form-item prop="username">
                    <el-input
                        :prefix-icon="User"
                        placeholder="请输入用户名"
                        v-model="registerData.username"
                    ></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input
                        :prefix-icon="Lock"
                        type="password"
                        placeholder="请输入密码"
                        v-model="registerData.password"
                    ></el-input>
                </el-form-item>
                <el-form-item prop="rePassword">
                    <el-input
                        :prefix-icon="Lock"
                        type="password"
                        placeholder="请输入再次密码"
                        v-model="registerData.rePassword"
                    ></el-input>
                </el-form-item>
                <!-- 注册按钮 -->
                <el-form-item>
                    <el-button
                        class="button"
                        type="primary"
                        auto-insert-space
                        @click="register"
                    >
                        注册
                    </el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link
                        type="info"
                        :underline="false"
                        @click="
                            isRegister = false;
                            clearRegisterData();
                        "
                    >
                        ← 返回
                    </el-link>
                </el-form-item>
            </el-form>
            <!-- 登录表单 -->
            <el-form
                ref="form"
                :model="registerData"
                size="large"
                autocomplete="off"
                v-else
                :rules="checkRegister"
            >
                <el-form-item>
                    <h1>登录</h1>
                </el-form-item>
                <el-form-item prop="username">
                    <el-input
                        :prefix-icon="User"
                        placeholder="请输入用户名"
                        v-model="registerData.username"
                    ></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input
                        name="password"
                        :prefix-icon="Lock"
                        type="password"
                        placeholder="请输入密码"
                        v-model="registerData.password"
                    ></el-input>
                </el-form-item>
                <el-form-item class="flex">
                    <div class="flex">
                        <el-checkbox>记住我</el-checkbox>
                        <el-link type="primary" :underline="false"
                            >忘记密码？</el-link
                        >
                    </div>
                </el-form-item>
                <!-- 登录按钮 -->
                <el-form-item>
                    <el-button
                        class="button"
                        @click="login"
                        type="primary"
                        auto-insert-space
                        >登录</el-button
                    >
                </el-form-item>
                <el-form-item class="flex">
                    <el-link
                        type="info"
                        :underline="false"
                        @click="
                            isRegister = true;
                            clearRegisterData();
                        "
                    >
                        注册 →
                    </el-link>
                </el-form-item>
            </el-form>
        </el-col>
    </el-row>
</template>

<style lang="scss" scoped>
    /* 样式 */
    .login-page {
        height: 100vh;
        background-color: #fff;

        .bg {
            background: url("@/assets/logo2.png") no-repeat 60% center / 240px
                    auto,
                url("@/assets/login_bg.jpg") no-repeat center / cover;
            border-radius: 0 20px 20px 0;
        }

        .form {
            display: flex;
            flex-direction: column;
            justify-content: center;
            user-select: none;

            .title {
                margin: 0 auto;
            }

            .button {
                width: 100%;
            }

            .flex {
                width: 100%;
                display: flex;
                justify-content: space-between;
            }
        }
    }
</style>
